The new El Niño phenomenons named central Pacific(CP) El Niño are discussed all over the world in the most nearly three decades.Specially,two types of CP El Niño which have different sea surface temperature anomalies(SSTA) structures are investigated in recent years.In order to recognize the different sea-air interaction processes of two types of CP El Niño comprehensively,in this research,we base on monthly Hadley Center sea surface temperature(HadISST),European Centre for Medium-Range Weather Forecasts(ECMWF) ocean subsurface temperature and NCEP/NCAR reanalysis datasets for 1979-2012,the characteristics of two types of central Pacific(CP) El Niño and coupled atmospheric processes are studied.The results show that there are two types of CP El Niño,the difference lies in sea surface temperature anomalies distribution in the tropical pacific.A type of CP El Niño(CP-Ⅰ El Niño) events have symmetrical structure about the equator in the winter,the warming center locate at Niño4 regions and stretch eastward into eastern pacific.Another type of CP El Niño(CP-Ⅱ El Niño),the sea surface temperature anomalies change in phase between Niño4 regions and tropical northeast pacifc areas (NEP,15-25°N,130-110°W),a banded and asymmetric structure of SSTA forms in the winter and shows horseshoe-shaped cold SSTA distribution in the western pacific.Further research indicates that the subsurface temperature anomalies(SOTA) of two types of El Niño are different.In the CP-Ⅰ El Niño winter,a zonal dipole mode forms between western and central-eastern pacific,the subsurface temperature of central-eastern pacific raise significantly,the meridional structure are also symmetric,a major positive SOTA center locates at the equator.However,in the CP-Ⅱ El Niño winter,a zonal dipole mode confines in the western and central pacific,the warming develop at the upper subsurface in the central pacific,the SOTA in the eastern pacific are tiny.Meridional SOTA also confine in the north hemisphere,two major positive anomalies center locate at the the equator and near 10°N.Characteristics of atmospheric circulation have distinct difference among CP-Ⅰ El Niño and CP-Ⅱ El Niño.In the CP-Ⅰ El Niño winter,the abnormal upwelling branch of walker circulation are over equator near the longitude of 180°,the abnormal downwelling branch locate at equatorial western and eastern pacific which responded to symmetric SSTA.In the low level atmosphere,there are significant westerly wind anomalies and convergent meridional wind anomalies in the equatorial area.The Hadley circulation intensify in the low latitude regions.However the mass transport between 20°N and 30°N are reduced which lead to southward move of downwelling branch of the Hadley circulation.In the CP-Ⅱ El Niño winter,the cross-equatorial southwest flow strengthen in the low level atmosphere,the upwelling center of Walker circulation move to north hemisphere which responded to asymmetric SSTA,the Hadley circulation weak in the low latitude regions to the contrary.In addition,the sea surface heat flux are investigated preliminary.In the August to December,the positive sea surface heat flux anomalies are observed in the CP-Ⅱ El Niño,which contribute to the warming in the central pacific and tropical northeast pacific.It shows that the wind-evaporation-SST processes exist in the tropical ocean.contrarily,in the CP-Ⅱ El Niño,negative sea surface heat flux anomalies damp the developments of SSTA.